In "AT&T and Other ISPs May Be Getting Ready to Filter," The New York Times reports that AT&T, Microsoft, and NBC are lining up in support of filtering the Internet to cope with digital copyright infringement problems.
On December 31, 2007, the Australian Telecommunications Minister announced that there would be mandatory Internet filtering for "inappropriate" material, and a posting about that decision, "Australian Filtering Announcement Raises Questions and Ire," provides a good overview of national-level filtering issues.
Read more about it at "Is AT&T Siding With NBC To Get Rid Of Neutrality?"